The graduated reader ability is especially cool. Select which chapters of Mounce you have covered, and the biblical text has ellipses for the words not learned yet. It will be better if they can eventually add all word frequencies to this function.
And I really like their philosophy of ministry and motivation...
Another tool to help "everyday be Greek day"! (in the words of Scott Hafemann)
The site is privately funded. It is not affiliated with any particular denomination or group, so that it might remain theologically neutral, encouraging the reading of the Scriptures themselves, God's Holy Word.
This work is being done as a service to the body of Christ at large, to the glory of God. May our prayer to God be: please teach us Your Word.